Electric signaling system.



O. T. NACHIOD.

ELECTRIC SIGNALING SYSTEM.

APPLICATION FILED FEB.25,1910.

Patented Sept. 1, 1914.

4 SHEETS-SHEET l.

1 NV E N TOR /1'1'TORNE Y.

C. P. NAGITOD.

ELBGTRI O SlGNALING SYSTEM.

APPLICATION FILED FEB. 25, 1910.

Patented Sept. 1, 1914.

4 SHEETS SHEET 3,

INVEN TOR AZTTONE Y.

WITNESSES.

ik/vvvxm) MJV Pt G. P. NAOHOD.

ELECTRIC SIGNALING SYSTEM.

APPLICATION FILED EEB.25,1910.

Patented Sept. 1

4 SHEETS M-IBET 4.

O7/VEN0R '6 ATTORNEY. I

omits srnrss" new o one: s. neonon, or PHILADELPHIA, PENNSYLVANIA.

- mn'ormo s ennczme SYSTEM.

To all whom it may concern:

- Bcit known that I, Cine. ,1. NACIIOD, a

citizen of the United States, residing in the city of Philadel his, county oflhiladelphia, and: State of l ennsylvanim-have invented :i new and useful Electric Signaling System, of which the following is a, specification.

My-invention relatesto a system of signaling nsed in connection with car or train movements of railways, and particularly to the car or train movements ofa railway system using electrical energy forits motive power, and more particularly to such electric railways as have single track. sections or blocks with turn-outs at various intervals for the passage of cars moving in opposite ning past the 'point where signalcontrolling means, such as insulated rail sections or contact device, is located, the preferred form of contact device being a trolley switch having no movingparts. I

yMy invention resides further in a system and apparatus, inwhich means are provided to insure that the signals, actuated or controlled by the directional trolley switch, shall be left in the same condition, after a car has improperly run into a block against a danger or prohibitive signal and backed out again to wait, as before it so improperly ran into the block.

My invention resides in other features hereinafter described and claimed.-

For an illustration of some of the manyformsmy invention may take, reference is to be had to the accompanying drawings, in which: I

Figure 1 is a diagrammatic View of my improved signoling system and apparatus showing the circuits and controls in normal condition, that is with no signals displayed,

nnd illustrates my invention as applied to a. car counting system.

Fig. 2 is {t simplified diagrammatic view of a modification of the :ipnaratus and system shown in Fig. 1. Fig. 3 is a simplified diagrmnmatic vicwof a further modification or form my invention may :tnke.

Fig. .4 a simplified ,dingramnmtic view-0f still another inod iiantionfon form nyiuvention may take. Fig; 5.1 ,2L.SllI1I)ll-,

Specification of Ietters: Potent. ssu s med rein-nar 25, 1910. Serial No. 545,869.

Patented Sept. i, ism.-

fieddiagranmmtic view of it further. modificatioir or form my invention may taire.

Fig. 6 is a. simplified diagrammatic View of a, further modification, or form my invention may take. Fig. 7 is a. side elevationsl yiewofn semaphore controlling or operatng means with attached senn'rphoreswitch. Fig. 8 is n end elevationsl view of the apps ratns shown in Fig". 7.. Fig. 9 is s dic- ;grammetic view illustrating a; trolley switch assoointedwith each branch of a turn-out. Fig. 10 is a diagrammatic View illustrating the momentary engagement of successive trolley switch contacts by the moving trolley wheel orother moving contact.

Referring to Fig. 1, l have shownvention applied, by w ry-of example, to a car counting system, such as disclosed. in my prior application. Serial No. 457,520.

In Fig. 1, 1 represents the trolley. or contact. feeder wire or conductor of on my inelcctric railway system for-o single track block or section which may hoof considerable length, but here shown as relatively short. At either end of th'eblock orsection 1 are turn-outs or side trucks to allow oars going in opposite directions to pass each other, or double tracked sections, there being n-signnl station A at the turn-outer doublc trnck at the left and a similar signal station 15 at the turn-out ordouble track at the right, the trolley or contact conductor being branched at station A into the double track: or turn-out or branch conductors 2 end 3, while at station 13 the single track conductor 1 branches into the double track or turnout or branch conductors 4t and 5. In the block 1 trnilic is in both directions, while in the tracks corresponding with con ductors 2 and 4. lll'ill'llc is toward the left, and over the. tracks associated with-comluctors 3 and 5, the trnllic is toward the right, all as indicated by the arrows. At catch end of the block 1 npproxinmte a. turn-out there is I provided a trolley switch which may assume a desirable form or construction so long as it has neighboring contacts-6 and .7.

The trolley switch may take the form disclosed in my prior Patent No. 922,025}, granted May 18. 1909. In such case oneof the longitudinally extending contact strips. as q' of said prior patent, may be divided into two parts insulated from each other, so that the trolley wheel or other moving contact will first engage one part of such divided strip and immediately thereafter nected to the trolley or other contact con doctor 1. a

The contact 6 at each station is connected by conductor 9 with the light armature 10 of a relay or electro-magnet 11, the armature 10 being held by gravity or a light spring against a contact 12 and adapted when the magnet or relay 11 is energized to be attracted into engagement with. contact 13, one terminal of the Winding of the magnet 11 being connected to said contact 13 and the other terminal connecting through the resistance 14- with the earth. or return conductor 15. Similarly, the tro1-- ley switch contact 7 connects by a conductor 16 to the light armature 17 of the electromagnet or relay 18, said armature 17 being normally held by gravity or a light spring in engagement with contact 19 and when the magnet or relay 18 is energized is adapted to engage with contact 20. One terminal of the winding of the magnet or relay 18 connects with the contact 20 and the other terminal connects through the re sistance 21 with the earth or return conductor 15. The contacts 13 and 19 are connected together by conductor 22, and contacts l2 and 20 are connected together by conductor 23. I

The conductor 24 connects with the contact 13 and with one terminal of the electromagnet F whose other terminal connects through resistances r and r with the earth or return conductor 15. 25 connects the contact 20 with the brush or contact 26 normally in contact with the bridging contact or ring 27 carried by but insulated from the movable core or armature' 28 of the electro-magnet E, a second brush 29 also normally engaging the contact or ring 27 and connected by conductor 30 to one terminal of the winding of the electro-magnet C whose other terminal connects by conductor 31 through resistances r and r to earth or return conductor 15.

The electro-magnet C has the movable armature or core member 32 normally held inunattr'actcd position by the spring 33. The core or armature 32 has attached thereto a rod 34 connected to the member 35 which, in the position shown in Fig. 1, abuts against the member 36 carried by the armature or core 37 of the electro-magnet D, such core 37 being held normally in the unattracted position by spring 38. The rod 39, connected to the core or armature member 37, is notched at 40 to receive the latch or lock 41 actuated by a spring, not shown, when the no-voltage magnet 42 is And the conductor dee'nergized, so that the core 37 and attached and controlled parts are held in the same position upon failure of energy in the line as. they occupied before such failure of energy, the winding of the magnet 42 being connected preferably permanently between the trolley conductor 1 or 3, by a conductor 13, and the earth or return conductor 15 through a preferably employed resistance 44.

On the shaft 4-5 is mounted a toothed wheel 46 adapted to be stopped around in opposite directions by the pawls 17 and 4-8, spring controlled and pivoted respectively upon the members and 36 of the opposing magnets C and D. Upon the shaft 4.5 is mounted also a contact wheel or disk 19 carrying the conducting pin 50 in electrical communication with said disk 49, and also carrying the insulating block or member 51. When the parts are in the normal position as shown in Fig. 1 the contact or brush 52 is in electrical communication with the pin 50 such brush 52 being connected by a Y i conductor 53 with one terminal of the red signal lamp R, whose other terminal connects by conductor 53 with one ter minal. of the magnet E. so that the lamp R is connected, by conductors 53 and 54:, in multiple'with thewinding ot' the magnet E. The brush 52 connects also by conductor 54 witlrone terminal oi the wind ing of the electro-magnet E, whose other terminal connects by a conductor 55 through a preferably employed resistance 56 with the earth or return conductor 15. The brush or contact 57 bcarsnormally upon'the insulation 51 and is connected by conductor 58 with one terminal of the electro-magnct 1) whose other terminal connects by conductor 59 with the trolley or feed conductor as 1 or The brush 57 connects also by conductor 60 with the brush. or contact 61 bearing normally upon the bridging contact or ring 62 carried by but insulated from the core or armature member 32 of the magnet C. The second brush or contact 63 also'normally bears upon the contact 62 and connects by conductor 64 with a brush or contact 65 opposed to the brush or contact 66 crmnecting by conductor 67 with one terminal of the white signal lamp W whose other terminal is connected to the trolley or contact conductor as 1 or 3. The brushes 65 and 66 are adapted to be bridged by the ring or bridging contact 68 carried by but insulated from the rod 39 attached to the core or armature member 37 of the magnet D when said armature member 37 is moved toward the right as viewed in Fig. 1.

In continuous contact with the disk 19 is the brush 69 which connects by conductor .70 with the brush or contact 71 normally in engagement with the bridging contact or ratus is sensitive to direction of movement of car or train under the same contact switch by means of the trolley switchand relays 11 and 18 as shown, together with the connections by conductors 24 and 25. As in my said prior application the, resistance 1' associated with conductor 31 and winding of magnet C is normally short circuited by the brushes 77 and 78 bridged by the contact 79 insulated from but movable with the core member 32. Upon energiz'ation of the magnet C the contact7 9 is removed-from engagement with brushes 77 and 78 and the addi tional resistance? is thrown into circuit with the resistance r in series with the magnet O. In like fashion, the resistance 56 associated Withmagnet E is-normally. short circuited by similar brushes 77 and 78 normally bridged by a ring or contact 7 9 and the oper ation is t is same. And so alsoin the case of magnet F the resistance r is normally short .circuited by its brushes 77 and. 78

normally bridged by the ring or contact 7 9.

lonnccted to the conductor 25 by conduotor 80 are the two contacts 81. and 82. Associated with the contact 81 is the contact 83 connected to conductor 84 to which also is connected the contact 85 associated'with the contact 82.

The contacts 81 and 83 are adapted to bridged by the contact 86 carried vby but insulated from the arm 87 pivoted at 88 and carrying at its other end the red semaphore disk or'blade 89-. And similarly the contacts 82 and 85 are adapted to be bridged by the contact 90 carried by but insulated from the bar-or rod 91 pivoted M92 and carrying at its otherend the white semaphore dislr or blade 93. The semaphores 89 and 93 are similarly actuated and controlled. For simplicity, the mechanism of the semaphore 93 only is described, and illustrated in Figs. 7.

and 8. Attached to the semaphore arm 91 is a weight 94 tending to more the somaphore 93 about its pivotal axis 92 in a clockwise direction, as'viewed in Fig. 7 to indicating or display position. Normally, howcveightherod '95 presses. against the under side of the weight 94 to keep the same clevated'and to keep the same in the position shown in Fig. 7. At the lower endoi' the 7 rod 95 is pivoted the bell crank lever 96 whose second arm is shown at 97, thebell crank being pivoted at 98. The rod 39 -211;- tached to the i'novablc armature or core 37 of the magnet l) engagcsthe hell crank arm 97, the spring 38 holding the parts in the position shown that is tosay, holding the rod95 elevated and holding the weight 9% raised. When the armature or core member $57 is moved to the right, as by the silent of e magnet (l, as hereinafter described, therod 95*is'moved downwardly so that the weight 94 is free to lift the semaphore to indicating or display position, and in that case the contact 9G is brought to position to bridge contacts 82 and 85. The other semaphore Stlis similarly controlled by the magnet E. 'Pknd when in the indicating or display position causes the contact 86 to engageand bridge contacts 81 and '83.

' The conductors required for the signaling system and apparatus as above described, are' the conductors 7 5 and 84: extending from the one station or turn-out to the other;

The operation is as follows: When a car or train passes toward the right from the turn-out or station A to thesingle track block 'or section, the trolley or other moving or sliding contact will cause electrical communication to be established between the trolley or other feeder conductor'l and the contact 6 oi"? the trolley switch. Chrrent then flows from condm-tor f1 through contact (3, conductor 9-, through relay armature '10, contact '12, conductor 23, conductor 25, brush 26,1'ing or ln-id'ging contact 27, brush 29, conductor 30, thewinding of the electrorr'uignet-C, thence by conductor 31, brush 77, bridging contact '79, hrusl'i 7S, resistance r, conductor 31 to the ground or return. track or return conductor 15, of the electric railway system, Current also passes from conductor QIlthrough the winding of the relay 18, resistance 21, to the ground or other return conductor 15, energizing said relay 18and causing its armati'ire to engage contact 20. As the'trolley wheel site 7 or other moving contact proceeds from left to right, it engages contact 7 before 1m; ing' contact 6, so that for an instant con- "n5 tacts 6 and 7 are electrically connected. T his is illustrated in Fig. 10; where the trolley wheel or moving contact to is shown leaving contact 6 and engaging contact '7 but in H contact with both. The relay 18 having r20 been energized due to the engagement with contact 6, it remains energized-during the time the trolley Wheel or other moving contact bridges coi'itacts 6 and 7 and also H during the time the trolley wheel or other contact is passing over the switch contact 7. Current then continues to flow from trolley or other conductor 1 through contact 7', conductor 16, relay armature 17, contact 20 and the winding or the relay 18 maintaining the same energized until the When current has passed, as above described, through the winding of the electromagnet C, the same is energized and its 'core or armature member 32 is attracted toward the right, as viewed in Fig. 1. During this movement the bridging contact 7?).

separates from brushes 77 and :7 8 and there is in effect cut into the circuit of the windmg of the magnet C the extra resistance section 7* which reduces the current, which 18 now, however, sufiicient to maintain the armature orcore in its attracted position,

and the current being thus reduced the heat ing of the magnet C is reduced. As the;

core member is attracted toward the right it operates the pawl 47 to step the,

toothed wheel 46 around-one notch and it simultaneously pushes toward the right the armatureor core member-37 of the electromagnet I), thus causing the rod 95, Figs. 7 and 8, to be removed from beneath the weigl'it 94, i

allowing such weight then to move the white semaphore or disk 93 in a clockwise threetion, as viewed in Fig. 7, tobring the same to display position.

Vilhen the parts have reached this position the-contact disk 49,,

mounted on the same shaft-45 with the: notched wheel 46, has been'rotated so asj to remove the insulation 51 from beneath, the brush 57, thusbringing brush 57 into engagement with the contact wheel 49 and,

in effect, bringing brushes 57 and 69 into electrical communication with each otherfi Simultaneously, however, the contact pin 50 has been removed from beneath the brush 52. Current may now flow from trolley orfced conductor 1 or 8 through conductor;

59, through the winding of the electromagnet I), maintaining the same energized, brush 57, disk 49, brush 69, conductor 70, through brush 71, bridging contact 72, brush 74, thence through manual switch 76 to conductor75 which extends to the distant station B where current passes through the switch 7 6, thence by conductor 7 5' through brush 74, bridging contact 72, brush 71, conductor to brush 69, .thence through the disk 4-0, through pin50, brush 52, conductor 54, winding of the velectroan-agnet E, conductor 55, thence through brush 77, bridging contact 7 9, and brush 78, associ- .ated with magnet E, to earth or return coni amass? ductor 15. When the electro-magnet E is thus energized it allows the red disk or semaphore at station B to move to indicating position by a control such as shown in Fig. 7. Here again when the movable core or armature of the magnet E is attracted toward the left, as viewed in Fig. 1, the

contact?!) separates from brushes 77 and nected-in multiple or parallel with the winding of the electro-magnet E. Then we have thestate of affairs that the magnet D continues energized but the magnet .C has been dei nergized. Current may then flow from the, trolley or feed conductor 1 or 3 through the white incandescent signal lamp VJ, con.- ductor 67, brush 66, bridging contact G8, which has now been moved'to the right because magnet D is energized, brush 65, conductortl t, brush 63, bridging contact 62, brush G1, conductor 60, to brush 57, which is now in engagement with the disk e9, through brush 69, conductor 70, through the line signal wire 75, through the apparatus at the other station, to the earth or return conductor 15. \Vhite light V is thus operated iii-shunt with magnet i). -We have thcnat station A the white light burning, and the white disk or semaphore displayed, while at the distant station the red light and red disk or semaphore are displayed for a carer train entering the block at sta tion A and moving towardthe right, in Fig. 1. With the white semaphore in indicating position at station A,lthe semaphore switch 82, 85, at station A iseclosed; and since at station B the red semaphore is in indicating position, the red semaphore. switch 81, 83 at station B is closed. Although the above mentioned semaphore switches are closed, a car entering from the left at station A and bringing the trolley wheel into engagement with contact 6 can produce no effect in the distant apparatus at station B, since at station B the switch 26,

27., 29 is opened immediately upon the energization of the magnet E at station B and before the red semaphore'switch 81, 83 at station E closes. And so on for each successive car or train passing under the trolley switch, the wheel 46 is stepped around.

a notch and the white light W is temporarily extinguished, but there is no change at the distant station where the signals show red or danger against any train or car attempting to enter toward the left into the block from station E.

- rAs. .each car or, train moves out to the magnet right from the block or section to the turnout at station B, the trolley wheel or other moving contact first engages trolley contact 7 whereuponcurrent flows from the trolley conductor through conductor 16, armature 17, contact 19, conductor 22, through the winding of relay 11, at station B, to earth, energizing said relay and causing its armature 10 to be attracted against .contact 13.

(Jurrent also flows during the traverse of contact 7 by the trolley wheel through conductor 22, conductor 24, thence through the winding ofv theelectro-magnet F at station B to earth. or return conductor energizing such electro-magnet F and causing it to withdraw the bridging contact or ring 72 from between the brushes 71 and 74, thus interrupting the current in the signal wire T5 and'thus causing deenergization of magnet D at station A, whereupon the spring 38 causes the notched wheel 46 to be stepped backward toward normal one notch. Then for 'an instant the trolley wheel bridges trolley switch contacts '7 and 6 and then traverses the contact 6. And during all this time current continues to flow through the conductor 24 and during all this time of traverse of both contacts 7 and 6 the electro- D at station A is deenergized. When the trolley wheel has passed off contact 6 at station E the magnet F is 'deene'rgized and the circuit is again closed between brushes 71 and 74. And if it be the-last car or train which has passed off from block l to the turn-out at B, the parts at station A have returned to normal position with the brush 57 Posting upon the insulation 51. It is apparent, therefore, that when all cars have passed out of the block section 1 to "the turn outB all the signals and apparatus-are returned tonormal position. i

The relays 11 and 18 are quick acting relays and their moving parts, as their on matures, are-preferably made very light and of very small inertia'so that they may be quickly attracted. These relays 11 and 18 operate so quickly that before the first trolley switch contact hasbeen traversed the controlled relay armature has been fully attracted. These reversing relays 11' and 18, in coml'iination with the trolley switch having adivided contact, as 6, 7, are so connected. with the trolley switch that whichever end or contact of the switch is first reached by the trolley wheel, the relay will cause the other contact of the trolley switch to be connected with the same magnet orderice in the main signaling apparatus. By this means the full length of the contacts in the trolley switch is utilized for electrical contact, And it is apparent also that by the reversing relays current is permitted to pass over either one of two conductors, as

H and 25, current'being allowed to pass over one conductor when-the-trolley wheel at station A, the red light and red scum-- phore are displayed and the red semaphore switch 81, 83 at station A is closed. And

suppose a car or train improperly runs past.

the red signal at station A from the turnout to the block section under the trolley switch 6, 7 at station A. 'lhe trolley wheel first engages contact 6, with theresult that current will flow through conductor 9, relay armature 10, contact 12, conductorf23, through winding of relay l8, energizing the, same and causing its armature 17 to engage contact 20; and current also flows from conductor through conductor 25. But our:

rent from conductor cannot pass through brush 26 to brush 29, at electro-niagnet E of station A, because the red semaphore magnet E at station A is energized, with the result that the bridging contact 27 has been withdrawn from between brushes 26 and 29,- and, accordingly, the magnet C at stat on A;

cannot be energized. Current does, however, flow from conductor 25 through conductor 80, through red semaphore switch 81,823 at station A, over the second signalwire 84L to the station B, thence through the white semaphore switch. 82, S5 at station B, then by conductor throughthe bridged brushes 26 and 2-9 and through the winding of the magnet C at station B, causing niagnet C to be energized and thereby step,

around the notched wheel 46 one more notch, just as if one more train or car had entered the block toward the left from station B. v

lVhen, a car or train which has improperly entered the block from a station A toward the right, causing the operation just above should not be removed from the trolley wire, but the car should back out past the trolleyare described, backs out again, the trollcy twitch 7, 6 at station A, the trolley wheel first engaging trolley switch contact 7. \Vhen the contact 7 is so engagedby the returning trolley wheel, relay l1 atstation A is energized and current willnlso flow over: comluctor 2i through the winding of the elcctro-imignct F to earth at station A causing the energization of the magnet 1 and the consequent interru tion of circuit between brushes 71 and at, thereby breaking the current in the signal wire 7 5 and cansmg the deenergization of inagnet'D atstation B, with the result that the notched wheel 46 at that station is now returned one notch toward normal, thus canceling at station B the effect upon the notched wheel 16 of'the improper entry of a car or train from station B to the block against the previously set red signal. This improper run ning past the red or danger signal at a station is quite likely to occur without any 10 fault on the part of the signal system or apparatus or on the part of the operator or motorman upon the car, because, "for example, a car or train may-reach the trolley switch 6 in passing toward the left from station E to the block, just a moment before a car passes from station A to the block toward the right. The result is that instantly the red signal is displayed at station A, and yet the car at station A cannot be stopped quickly enough to prevent the actual running past the trolley switch. When the motorman or operator has then brought his car to a stop, he backs off, as above de scribed, canceling the efiect in the signaling apparatus at the distant station.

The second signal wire 8 1 with its cooperating parts causes the-counting up on the notched wheel at a distant station one notch for every car which has improperly 3 passed the red signal atthe home station; ---while the cancellation of this counting up at the distant station issecured by inter rupting the current in the signal. wire 75. Thus, the signal wire 84 with its cooperating fss lparts is a'means for producing an operation in the signaling apparatus at a distant station corresponding with the-entry at that distant station to the block of a car or train.v The signal wire 84 with its cooperating parts in 40 eect puts the signal apparatus at the dis tant station in such condition that the subsequent backing out at the home station of a car or train, which has improperly en-- tered the block against the red, will leave the-signal apparatus at the distant station in its previous condition. It will appear, therefore, that the signal wire 84:, with its associated semaphore switches, is a means of communication with the signaling apparatus at the distant station only, such that a record may be there produced for the improper entryof a car against the red at the home station, which record may be canceled through other means at the subsequent backing out of-the car at the home station.

While I have shown the trolley switches as located on the single track, block or section, it is to be understood that they also may be locatcd'on each branch of the turn-outs, in

which case similar trolley switch contacts are connected together, as seen in Fig. 9.

In Fig. 2 I have shown'a modified arrangement of the signaling circuits accomplishing results similar to those described in connection with' Fig. 1. Here, similar reference characters refer to like parts in Fig. 1. Associated with the movable arma-' tu're'or core of the magnet L, however, is a further switch comprising the ring or bridging contact 99 and associated brushes 100 and 101, the brush 100 being connected with conductor 25. From the brush 101 at the left hand station A extends a conductor 102 to the conductor 25 at the right hand station. And from the brush 101 at the right hand station E extends a conductor 103 to the conductor 25 at the left hand station A, there being, accordingly, three signal wires extendingbetween stations, namely, 75, 102 and 103. In this case there are no semaphore 3 switches as in Fig. 1.

In counting in and counting out cars the operation of the arrangment shown in Fig. 2.- is the same as that shown in Fig. 1. Suppose, however, that one or more cars or trains has or have entered thehlock or section from station B toward the left. The step-by-step mechanism at station B then has been moved as many notches as cars or trains have enteredthe block. Accordingly, at station B the white semaphore and white light are displayed, while at station A the red semaphore and red light are displayed, the magnet E being in such case energized at station A, with the result that bridging contact 27 has been removed from between brushes 2G and 2!), while the ring or contact 99 has been brought into position to bridge brushes 100 and 101. Accordingly, when a car passes from the turn-out at station A toward the right to the block or section 1, trolley switch contact 6 is first engaged by the trolley wheel allowing current to flow'from thetrolley wire 1 through the contact 6, conductor 9, to the armature 10 of the relay 11, thence through contact 12, through conductor 23, thence through the winding of the relay 18, to earth or return conductor 15, energizing said relay to bring" its armature 17 into engagement with the contact 20. Current also flows from conduc tor 23 through conductor 25, thence through brush 100, bridging contact 99, to brush 101., and thence over the conductor 102 to conductor 25 at station 1%, thence through brush 26, contact 27, brush 2%), conductor 30, and thence through the winding of the magnet G at station B to earth or return conductor 15, causing such magnet C to he energized and thereby stepping around the stcp-by-step mechanism a further notch, just as if an additional train or car had entered the block from station B. At station A, the magnet C is not energized because, due to the energization of the magnet E, the circuit of the 12s winding of the magnet C is opened at brushes 26 and 29. The car which has improperly entered the block from station A against the red signal in backing off causes the trolley'wheel to first engage with trolley tact 13.

switch contact 7, thereby-allowing current to floivfronr the trolley WlIQl, through conductor 16h; the relay armstore 1-7,- thence to contact 19 and by conductor 22 through the winding of the relay'll, energizing the same of the circuitthrou h Wire 75 causes at Silk if v. 9

tion 13 decnergization of the mag'n t with the result that the stcp by-step'inechnnisin is returned toward iioiina'l oue' notch, thus canceling the effect produced in that steplay-step mechanism when the-carat station A nnpropcrly enters the block l'agai'nst the red signal. Here again it is apparent that, the mproperly entering car in entering and; at the proper" backing out leaves the signals comihtiou ofjindieation.

in Fig. 3 a furtlicr modification of the c1rcult arrangement is shown u'hicli ivill, how- I ever, produce results similar to those dc-' scribed. in connection with Figs. 1 and. 2. Here the two extra signal Wires 102 and 103 of r 2 are supplai'ited by one extra signal wire 104i and a two-way switch. At each station an additional two-way switch is provided, and there is provided a second-signal conductorconnecting the two-Way switches at the different stations. This two-way switch, may take the form ofthe disk 49 with associated insulation 51, pin 50, brushes 52, 57, and 60, and may be operated bythe same ratcl'iet or notched wheel 40, as shown inFig'. '1. The two-way. switch is shown as ornnp'rising the contact disk mounted upon the shaft 4:), with associatedinsulation 51 brushes 52 57. and (302 the broth :32"

normally engaging the conc lucting pin 'lhebrush 60 at station A conneetcil'by. conductor 10 lwlth brush 09 atstation B.-

; ...--sociatcd with the elcctro-inagnet E at each station are the Contact 99 and brushes 100 and 101, as'in Fig. 2.

The counting in and counting out of trains or cars in the normal operation is the same as described in connection with Fig. 1. Supus-e lmwe reig that one or more cars or trains has or have entered the-block 1 tou'ari'l the left from station B. Then the. step-by-- step mechanism at station B has been stepped around. as many notches as cars or trains have entered the block, and at station E the white light and White semaphoroare displayed, while at station A the red light and red semaphore are displayed, thejelectro uiagnet E at station Abeingenergizeds 55 so that bridging contact 27 has been Withdrawn froin between brushes- 26 and -29,

While bridging contact 99 has been brought into engagement with brushesi 100 and 101.

Now suppose a car enters from theleft toward the right from stationA to blockl. The trolley wheel first engages contact:0:

oi the trolley switch with resultant how of 7 current from the-trolley conductor 1 through conductor 25, thence through brush 100, contact 99, brush 101, conductor 105 to brush 69, thence over the signal conductor 10% to 5'5 52, to pin-50, to contact disk' tl gto brush 1 the distant station B, through brush 09%,

disk 4-0, to brush 57, (because the step-by.,

step'inecbztnisni has at station E removed the"- magnet at station E, thence to earth orreturn conductor 15, causing the energizetion ofthe magnet G at station E to count up on the stepl)y-step mechanism another insulation 51 from beneath-the brush 57) to brush 26', through contact 27, to brush -29, conductor 3O through the winding of thev notchtjust as if an additional car or train.

had entered the block from station 13.

- When the car improperly entering from.

station Agto' the block backs out 'agsinjthe" energizing said magnet F to remove the bridging contact 7 2 from between brushes 71 and 74, thus breaking the circuit through the signal wire 7 5 and causingut station B the deenerglzation of the magnet D,'W1ththe consequent return of the empty-step; mechanism one notchtoward normal, thus ca'nce'ling the eii'ect of overcounting made by the improper entry oatthe car against the red at station A.

In Fig. 4, a'iurther modification is shown,

in" between stations. Here the electro-ma nets E at each station have associated with thei as in Fi ns. 2 and 3 the brid 'ina' contact.-

)9 and the brushes and 101. lVit-h the electro-magnet D at each station are associated two additional pairs of brushes and associated bridging contacts.

Brushes 100 a and 107 constitute one of these pairs and have associated with themthe' bridging contact 10S. Brushes 109 and 110 constitute the other pair and have associated with them" bridging contact 111. Normally, that is,

when the magnet D is dccnergized, brusl'lesr; 109 and 110 are bridged by the contact 111,

While the contact 109 is removed from between hrushes 106 and 107. And when the magnet D is energized, brushes 106 and 107 stations; are connected to the corresponding brushes 107 and atthe. distant station.

' Brushes 26, 100,.and 106 are: electrically con toward the' left to the block or section 1.

Thenthestep-by-step mechanism at station 15 has counted :up as many notches as cars or trains have entered. the block and the white signals are displayed; and at station A the red signals are displayed, the electromagnet E at station A being energized so that the circuit of electro-magnet G at station A isbroken by the separation of contactQ-"i' from brushes 20 and 29; but contact 99 has bridged the brushes 100 andlOl. Now suppose a car improperly enters from turn-out Aito. block 1 against the red signals. In passing the trolley switch 6, 7, from left to' right, current passes from conductor 1 through conductor .25, thence through brush 100, bridging contact 99,

brush 101-, conductor 113, brush 109, to.

brush 110, thence over the line signal wire 112 to the distant station where, since the magnet D at'stution B is energized, brushes 100 and 107 are'bridged and current, therefore, flows from brush 106 to brush 26, by

conductor 25, thence to brush 29, conductor 30, through the winding of the i'nagnet C, to earth or return conductor 15, thus energiziug the magnet C at station and operating the step-by-step mechanism a further notch, just as if an additional car or train had entered the blocltl from turn-out B. Now, when the car backs out again from block 1 :over the trolley switch 7, 6, at station A, current will flow over the conductor 2 1 through'the winding of the electro-magnet F to earth or return conductor 15, energizing the electro-magnet F and causing the bric ging contact 72 to be removed mom between the brushes 71 and 7-1, thus lnterrupting the circuit through the signal wire 7 5 and causing a consequent deenergization of the magnet D at station B to move the step-by-step mechanism back toward normal one notch, thus canceling the effect of the improper entry from turn-out A. to block 1 of the car or train running past the red signal I In Fig. ii a further modification 15 shown. Two signal wires are employed, one of them roiiperating with white seu'iaphore switches. Whenone or more cars or trains has or have entered the block section 1 toward the-left from turn-out B, the step-by-step mechanism at that station has been stepped around a'number-of notches corresponding with the number of cars or trains so entering the block, and the white light and white sema-,

and, therefore, holding the bridging eontact 27 away from brushes 26 and 29-, so that the circuit of the magnet-C at station A. is open. But when the redsemaphore is displayed at station A, due to the energizetion of magnet E, the contact 99 bridgiug brushes 100 and 101. Conductor 25 at each station is connected also to a semaphore switch Contact 11-1 while the opposing semaphore switch Contact 115 is connected by conductor 116 with brush 101, the movable contacts or members of the white semaphore at both stations being connected by a signal wire 117 extending between stations. Now if a car runs past the read signal at station A to the block 1 from left toward the right, when the trolley wheel passes the I trolley switch 6, 1, current will flow from trolley wire 1 through conductor 25, brush 100, bridging contact 99, brush 101, conductor 116 to white semaphore switch contact 115 at station A, and which is in con- .tacl't with the mo able member of the somathe contact 114. thence from contact 11 1 1 over conductor 25 through brushes 26 and conductor 80, through the winding of the electro-magnet C, conductor 81 to earth or other return conductor 15. quence, at station 13 the electro-magnet C is energized moving the step-by-step mechanism around another notch, just as if an other train or car had passed from turn-out B from the block section 1 toward the left. in backing out again past the trolley switch 7, 6, at station A, current will flow from the trolley conductor 1 through conductor 21 to earth or return conductor 15, through the winding of the clectro-mugnet F, at station A, energizing said. electro-magnet 1 so that the bridging Contact 72 is removed from between brushes 71 and. 74:. thus breaking (he circuit including the signal conductor 75,.causing at station B the deiincrgization of the magnet D to return the step-by-simp mechanism one notch, thus canceling the previously counted notch due to the im proper entry of a car against the red from turn-out A to the block 1.

In Fig. 6, a further modification is shown where semaphore switches are omitted and two signal wires are employed. Here a In consemesses brush 118, connected to conductor 25, is

adapted to be brought into electrical communication with the brush 119 by bridging contact 120 carried by the movable member member or, armature of the electro-magnet C, the connection between brushes 122 and 123 being interrupted by withdrawal of the contact 124 when the elective-magnet C is energized. Brush 123 connects by conductor125 with brush 101; and brushes 119 at the two stations are connected together by the signal wire 126, extending between stations.

The counting in andcounting out operation is the same as in the preceding figures and in Fig. 1. Suppose one or more cars or trains has or have passed from turn-out B toward the left to the block section 1. Then at station B the step-by-step mechanism has been moved around a number of notches corresponding with the number of cars or trains which have so enteredtheblock. At

station B, therefore, the magnet D is energized andthe brushes 118 and 119 are bridged by .a contact 120 and the white signals are displayed. At station A, however, the electro-magnet E is energized so that the circuit of the winding of magnet O at station A is interrupted by withdrawal "of contact 27 from between brushes 26 and 29; but brushes and 101 are in electrical communication through bridging contact 99, and the red signals are also displayed. Magnets C and I) are not energized under these circumstances at station A. Now, if a car or train improperly runs past the red at station A from the turn-out to the block section 1 toward the right, current will flow over conductor 25 to brush 100, thence across contact 99 to brush101, thence by conductor 125' to brush 123, thence to brush 122 over contact 124:, thence by conductor 121 to conductor 126 to the distant station E where current will flow through conductor 121, to brush 119, which, due to the energizetion of magnet D, is in electrical communication through contact 120 with brush 118, and current Will flow by conductor 25 to brush 26, thence through contact 27 to brush 29,- conductor 30, winding of the electro-magnet C, conductor 31, to earth or other return conductor. 15. The electromagnet Oat station B is, in consequence, energized and moves the step-by-step mechanism around one more notch, ust as if an additional train or car had passed from turn-out B toward the left to block section 1. Now when the car which improperly entered the block 1 from the left at station A backs out again, current will flow from trolley conductor 1 through conductor 2% and the winding of the electro-magnetFto earth or return conductor 15, energizing the electro-magnet F so that bridging contact 72 is removed from between brushes Tiand' i7 1, whereby the circuit of conductor 75, ex-

tending between stations, is interrupted, with the result that at station 15 themagnet D is deenergized ten'iporarily, as in conned tion with'the previous iigiires,whereby the step-by-stepmechanism is returned -'o'n'e; notch toward normal position, thus'canceling at station B the notch or step counted up by the entry of the car or train pastthe' red "from turn-out A to block section'ii.

From the description of Figs. *1 tot an elusive, it is apparent that a directional seii sitive device is employed-which operates-to clear or set the signals according to the direction of the car or train; and it isalso apparent that means are provided insuring that the signals, controlled by such direction ally sensitive device, shall be left in the same I condition after a car or train has run into the block against a red signal, and bacled out again to wait, as before such car or train so improperly proceeded. -rind it is appar-' ent' from the description of the cooperation of the trolley switch contacts 6 and 7 and the relays 11 and 18, witlrconductors 24 and 25, that the construction, arrangement and operation is such that whichever of conduc tors 24, 25, is brought into'electrical com munication with the trolley wire 1 by initial engagement of trolley switch by the trolley .wheel, remains so in electrical communica tion with the trolley conductor 1, the relays operating as transfer devices as the trolley wheel proceeds over the contactsto fnairr tain the same relay energized throughout the passage of the trolley wheel over'the contacts; and that when the trolley wheel passes in opposite direction the other of conductors 24 or 25 is brought into electrical communication with the trolley Wire 1 and so remains during the passage of the trolley wheel over the contacts; and that thou h the trolleycontacts 6 and 7 are separate, by the arrangement shown and described the length of time that the conductor 24, or 25, is in electrical communication with the troll'ey wire 1 is the same as ifthecontacts 6 and, 7 were crmtinuous.

What I claim is:

1. In a signaling system, home and dis-= tant stations at opposite ends of a block, car counting apparatus at said home station,f a signal conductor extending between said stations, a stop signal at-said distant station, a vehicle controlled contact and con nections at said home station controlling the actuation of said counting apparatus andcontrolling the display of said stop signal through said conductor, a directionally sensitive switch at said distant station and con i:

nections including another conductor extending between stationscontrolled by said switch for further actuation of said connting apparatus at said-home station upon imroper. entry of a vehicle fromsaid distant station to saidblock, clearing mechanism at said. home station ,for returning said car counting apparatus ,toward normal, connechens-controlled by said directionally sensitive switch for actuating saidclearing mechanisnithrough said first mentioned conducto flnpon backingout ofsaid vehicle from said lolock at said distant station, whereby the efieet upon said can counting apparatus producedjhy said Vehicle improperly. entering-said blocknt said distantstationiscanceled 2.1;na signalingsystem, home and distant stations at opposite ends-of a block, car counting apparatus and a permissive signal at said home station, a stop signal at said distant, station, a conductor extending between said stations, a vehicle controlled con tact; at said home station and connections controlling the display of said permissive signal and the actuation of said carcounting apparatus and controlling the display of said stop signal through said conductor upon the passage of the first vehicle from said home station to said bloclnanother conductor extending between said stations, .a switch ateach station in said second conductor, means actuating said switches when said permissive and stop signals are set, a directionallysensitive switch at said distant station, connections including said second conductor controlled by said directionally sensitive switch further actuating said car countingapparatus at said home station upon improper entry of a vehicle to said block at said distant station, and clearing mechanism at said home station for returning said car counting apparatus toward nor mal, said directionallysensitive switch con-v trolling said clearing mechanism through said first named conductor upon backing out of said'vehicle fromsaid block at said distant station, whereby the effect upon said car counting apparatus upon improper entry of said vehicle at said distant station is distant'station when said c ar counting ap paratus at said home station is actuated,

means at said distant station and coiiperating means causing mrther actuation of said our counting apparatus at said home station upon improper entry of a vehicle from said distantstation to said block, and means 00-. operating with said stop signal displaying means for restoring said car counting appa' ratus at said home station to its former condition upon the backing of said vehicle from said block at said distant station.

4. In a signaling system, home and dis tant stations at opposite ends of a block, signal displaying and clearing mechanism at said home station, a stop signal at said distant station, means for actuating said signal displaying mechanism at said home station and said stop signal at said distant station, said mechanism including carcounting mechanism, car counting mechanism at the distant station, means preventing actuation of the car counting mechanism at said distant station when said signal displaying mechanism at said home station has een: actuated, means at said distant station and cooperating connections causing actuationi of, said oar counting mechanism at said. home station upon inuproper-entryof a've- I hicle from said distant station to said block, and means controlling said mechanism at said home station to return said car counting mechanism to its previous condition upon the backing out of said vehicle from said block at said distant station.

5. In a signaling system, home and distant stations at opposite ends of a block, step-by-step car counting mechanism at each station, an electro-nmgnet for actuating each of said car counting mechanisms, a clearing electromagnet at said home station controlling the return of said car counting mechanism at said home station toward normal, a stop signal at said distant station, a vehicle controlled switch contactat said home station and connections controlling said our counting magnet at said home station and said stop signal at said distant station, a switch interrupting the circuit of said car cormting magnet at said distant station upon control of said car counting magnet at said home station by said vehicle controlled switch contact, means responsive -to improper entry of a vehicle from said distant station to said block for controlling said car counting magnet at said home station, whereby said counting mechanism at said home station counts another car, and means responsive to the backing out of said vehicle from said block controlling said clearing magnet at said home station to restore said car counting mechanism to its previous condition.

(3, Inasignaling systcimhome and distant stations, car counting apparatus at both stations, :1 stop signal at a. distant station, ,a conductor extending between said stationsn'a. vehicle: conti ollsd. contact andicdn nections I controlling saidwas mounting sipparatus at the home station and i controlling said stop: signal st said distant station through said :conductor, moons 'pnoventing actuation of our counting i apparatus stsoid distant station 1 upon s'otiuition ot-scid on? 3 counting apparatus at said liomozstntion, a second signal con'ducton extending botwocn said stations, and a directionallyisonsitive' switchwcontnolling one' on mnothw ofusoid signal conductors =dspoi'idingiupoip the direction. of movement of; a vehicle, said sec-- ond conduoton tonnootsdmvithssidi l'contitolding connections of saidi csjmcounting apparatns at'i'thei home station onds thereby f controlling iztnrtherractnstion nf siiidncai" counting apparatusost saidlIOm'E' ststion. I 7 In a' signaling 1 system,- lioms and distantstations, car countingisppssstusi at both stations, axstopw signal: at an distant station, a conductor i extending i between said Mstsv ltions, a' vehicle contnollctl contact and connections controlling caiwcounting apparatus 2st the horns station andiscontivolling said stop signal at saidiidistant station thsongli said conductor, i megms preventing .Hilcbllifitlml rot saidcgmwbunting appamtusg ztt said distant station upon sactumtionriota ssidi cnr coun'tin g apparatus ot: :ssirl home i :s'tntiomi a second signal 'conductor oxtonding botwcon so id stations, in; directionally scnsitivoswitch controllingone =or..:-nnotliei' of szii'dwsignal conductors depending upon tho direction of :mo'vementof a-vchicle, snidsecond sconductorconnected with said ioonti ollin g conncc- I 'tions of isaid car countingiappsiratns itiths home station and therebyacontrollingffutither. actuation of' saidcmi'.-;counting apps-1- 'i'atus at 'siiid: :home' station; and is clearing magnet at said homeistzition ton metnnning I said can counting apparatus itoward nornml, *s'oid directionally wse'nsitiwo i switch: :contnolilinag said cleaning; magnet through said 'ifil'St maimed conductor to i'etilrnisaiid'ooiv counting 1 =aippsnatus to itsiprevioilsoondit-ion. i .11. :18.: Inc signaling system, homcisnd distant stations,permissiveT and stop-signals at each station; it directional?sensitive switchat each-station, :aaconcluctor siatending betweensistations and. connections controlling the display of the permissive signaliatf said home :stationi and said i stop E signaii at *said distant station, is second; oonductoruextcndiiiig between 1. said stations; :a- 'switch con-- trolled by eocltipermissive and -ea.ch.st0p signal; [at each station I included iim said :con- 1111013015,: swic'tswitches i till each 'ststionwbsing connected inimllil'tipli withicsch other, stepby-step mechanism-at SitldidlOIHBzSilitiJlOIi, and -connections I including said a soo'o'nd fconducitoiwcontrollcdeby said sdircctionally sensit-i-ye-switch anti-said distant station ;forI-ac- ;tuating;said'steprby-stop mechanism,

iii-9i In=ia;', signaiing system, home; aind:-,dis-

taint i ststhms, permissive; 1 sink 1 stop I signals 'zvt issoh station, s :clirotationally ssnsiivs SWltG-Zllfllt enoll station, moondnctor oxtcnci" ing betwosn stations and connections sontroilin-gq tho display oithe permissive wig- .nolyslt ssiirl l'iomo stction and said stopsig mil at Hftftil. distant station, n second conductorg ooxtonding between said stations," a switch i controlled "by: cash 1 permissive; r and such stopilsignal at each. station: included in said conducting-said" switches at such: ststion bcingcon-nected in 'mnltiplewith each othem zstepby-step moclmnisin at said tonic StatlOIlyfiJld' connections including said secondconductor: controlled by said directionally sensitive switch at ssid distant ststion for actuating said stepivby stsp. mechanism, means for returning-said step.by-stsp moon mismir toward I1OFLTl&l-'tlldi connections-in- :cludi ng Sitld first :nsmedi eoonductor controlled-by said directionally sensitive switch at saiold'istsnt station contnollingfssid .mealnsui 4 i 210; z In Pa signaling system, ilioins and distimt stations, step+by-stcp :nisciianisniat esoii station,- i zinr slectro-magnet controlling: ssicl stcpebymtcp mechanism 1 at 82mb station; s

-e1'missive si 'nal at said liomostationwcom ne t at'said distant station controlledby saidstop signal magnctatsaid distant station, a: 1 directionally sensit'i vs switch? at said distant; station, and a conductcm controlled by said directionally sensitive switch -roonneotsd Witli i said: controlling connections 1 26f said electrd-magnet at saidhom'c stiition'and connctedv to: said switch. controliging: 2 said -step- .byssts .1 magnet at said distant. station. 1-? 5.;

w 11: ns signaling systemflhoms andro d-istsnt stntionsypcrmissivc and stop signals-5st each station, czar counting meclinnism'nt each station, a vehicle controlled switch and.- con nections control] ing said. cs1 connting.mcclisin-ism atsiiid home. stationand controlling the stop signal at said. distmit stntion,-sswitchwat said distant station preventing actuation; of Y the can I counting apparatus thevsatiwhcnsaid stop signal thci'sat is-di'sployed,.o conductor connected to said {last named; switch. and connected with said-con; trolling connections of said 0&1? conntingnpparatns ahszi'irl-home sta tioinsnd a directionaillyi sensitive switch at said distant ststionmntnolling snid'conductor. I 12. 111- 2 signaling. system, .liome 2nd,;di8r iant stations, pemnissive andi stop signalssait 68,011 statiomsarcounting moclianism'atoach stations; weliiol controlled swit h nn'sliiO ilo nection controlling said car counting *meohw nisin at said zhome'; station: and controlling thewstop signal-at said distantstatiom af switchrat; said distant station preventing aotuation' of the car counting gappa-ra tus thereat when said stop signal thereat? displayed, a' eondiictor'conneeted .tosaid last. named switch and connected with saidlcontrollingi lconnections oi said car oounting apparatns Fat) said home station, a directionally:sensitive switch. at said distant station controlling :said conductor-{andswitches in. said con ductorextending between i said stations, and means: for controlling-one of said last named switches-lat each station upon the display of a signal at eachstationi r r r 13. In a signaling system, home-and distant stations, car cou ntingi machanism at each'station, a can counting magnet at each station, a stop signal at a distant-station, a iirel iicle controlled contact, a conductor ex- Etendingnbetween stations, said vehicle' con trolled contact and connections controlling said: car counting magnet at 1 iihe'zll0m station and oontrollingsaid stop signal at said distantstation through" saidconductor extending between iStLlZlOIlS aneansg preventing 1 actuation .ofwsaid car counting magnet at said distant: station upon: actuation es I said; ear countin g magnet at said home station, a second signal-conductor extending-between said stations, arestoring: electro inagnet at each; station controlling restoration of the car. dountingimechanism thereat; and a dia'ectionally'sensitive switch for controlling either said car counting magnet orsaid re-; storing magnet at a station depending upon the direction of movement ofa i ehicle., said, second conductor connected with said con trolling connections of i said can counting mechanism at said home station andthereby ieontrolling further actuation of said car counting mechan-ism at saidz-home station. I 1; 145111 a signaling system, home and 'distant stations,-a :signal and az 'controlling magnet therefor at said homestation, Wehiclecontrolled means controlling said magnet, a stop signal and a controlling magnet therefor fat the distant station, means'for displayingi said stop signal iiponi'the display :of said signal at said home station comprising a circuit includingsaid magnets in series with each other; andavehicle controlled 'switcha-at saidwlistant station and connectionscansingov-ersetting of said controlling means'at said home station upon improper passage of'said stop signal by' avehicle at saiddistantstation.

v 15. Ina signaling syst*eni,-home and distautstation's, a signal and' ycontrolling magnet therefor at said homc st'ation, vehicle controlled means controlling said magnet, iastop signal and acontrolling magnet therefor at the dist-anti station; in cans for 'displayingsaid stopsignal'upon the display amass odi said signal'at said home station coinpiising a circuitfincluding saidimagnets in series with each other, 7 a vehicle-v controlled switch zit-said distant'station and connections causing 1 ovenisetting of i said controlling means at said home station- 1113011 improper passage of. saidvstop signalby a vehicle at said dis taut station,- said .vehicle controlledswitch ;at said distant station and 1 connections oaus- 'in'gmeturn of said controlling means at said 5 liomelstationto its previousoondition upon return ofsaid 'NfllllQlQ 4 past said stop signal. 1605121 a i signaling system, home and. distent. stations, a signal at- SilidwllOIIiQfitflfilC-H, vehicle :controlledi means controlling said signal,"a: stopsignal ats'aid distant station, a circuit extending betweeni-said stations energized upon the display: at said signal at said home stat ion, said; circuit when energ'ized maintaining saidsignalsat said home and said distant stationsat display positions, ;a second circuit extending 'between said :stations, saidwcircuitwhen energized over-setting said signal controlling means at said; home st'atiomand; a: miehicle controlled 'switch. controlling; saidseco'nd rcircnit to. .energize the-same upon :passage: :or" a; vehicle past said stop signal at saiddistantstation. 1x175 In a-signaling'systmmdmmeand distant stations, a signal: at.- said homevstation, vehicle controlled means controlling said signal, a: "stop signal? at: said distant .station, acircuit extending.- between; said staltions energized upon-the:- di'splay of said sigfnalat said-home station, said circuit *Wll en energized maintaining saidwsignalsat said home and said distant-stationsat'display positions, a second -circuit extending'betwcen saidcstations, said circuit when energized over-settin, said signahcontrolling means :atisaid homeistation, and rawhide-controlled switch con-trolling said secondscircuit to en- --ergizeotliei same upon; passage of a: vehicle 'rpa'stisaid :stop'sigual at: said distant station, said vehicle 5 controlled switch controlling said first circuit to denergize the same iupon return-zof said vehicle past said stop signal. at said distant station, and means controlled :by the-'- donergizati'on of 'said. :fi-rst circuit whereby r'said signal controllinglmeans at said home station is returned to' its Epre vious condition-.-

1 i i i 118.1 lnia signalingsystem, home and distant stations, a signal-at said home station,

vehicle controlled meanscontrolling said '12 signal,- a stop'signal at said distant station, a'circuit extending between-said stations energized upon the display of sa'id signalwat said hoiiie station, saidcii cnit'avhen energized" maintaining said signals at I said home &2

and said distant stations 1 'at display positions, a second circuit extending lbetween said 'stations, saidmircuit when energized over-setting I said signal controlling means at-said home station, a-nd -a vehiole controlled switch controlling said second circuit to energize the same upon passage of a vehicle past said stop signal at said distant station, and switches in said second circuit at the home and distant stations closed upon energization of said first circuit.

19. In a signaling system, home anddistant stations, a signal at said home station, vehicle controlled means controlling said signal, astop signalat said distant station, a circuit extending between said stations energized upon the display of said signal at said home station, said circuit when ener- 'gized maintaining said signals at said home and said distant stations at display positions, a second circuit extending between said stations, said circuit when energized oversetting said signal controlling means at said home station, a vehicle controlled switch controlling said second circuit crgize the same upon passage of a. vehicle past said stop signal at said distant station and controlling said first circuit to deductgize the same upon return of said vehicle past said stop signal at said distant station, meanscontrolicd by the deenergization of said first circuit to return said signal controlling}; means at said home station to its previous condition, and switches in said sec ond circuit at the home and distant stations closed upon cnergization of said first circuit. In testimony whereof l have hereunto affixed my signature in the presence of two subscribing witnesses.

CARL P. NACHGD. Witnesses:

ELEANOR T. MCCALL, Anna STEINBAGK, 

